The element represented by the symbol "He" on the periodic table is helium. Helium is a colorless, odorless, and inert gas that is the second lightest and second most abundant element in the universe. It is primarily produced through nuclear fusion in stars, including our sun, and is commonly used in various applications. These include filling balloons, as a cooling medium in MRI machines, and in cryogenics. Helium is also utilized in scientific research due to its unique properties, making it essential to a variety of fields, including physics, engineering, and environmental monitoring.